Yep, you can span static images but anything dynamic is confined to a single monitor. Windows 10 does a good job of spanning images across multiple monitors, which is why I was more interested in the dynamic aspect.
I have used Stardock's excellent Windows 10 menu replacement, Start10, pretty much since I first installed Windows 10 and it has been perfect for my requirements, so did not hesitate when I saw Deskscapes and purchased it without running the Trial version first. Like Start10, it does what it says on the can... very nicely... but... I run a two-monitor setup, with the desktop, including background, spanned across the pair and would really liked to have seen this as a feature of
I too received the same "warning" and figured out a really simple way to avoid it... stop using Chrome!! It also flagged a number of other applications as being incompatible and suggested I remove them, including anti-malware and other security programs. So now we have Google suggesting we make our systems less secure! The sad thing is that there will be those that slavishly follow Google's "advice" and end up compromising their systems. So far as I am concerned, it is